i *agree with John.
you should be very specific about the parts on the car in order to answer you.
so far we know :S14 kouki ,S14~SR , DISCO-gt28rs, flywheel, Greddy fmic, hks TT, LSD(?).
any electronics , suspension , Wheels ,int/ext alterations ,music ,car's color, condition.
car sounds nice but if you want to honestly know what its worth..POST PICS ~ details.
also, who did the work ?